Southco Cam Latches, Steel, Zinc Plate, Bright chromate E5-4001-M03

Southco’s Universal Latch Sensor is a simple magnet that attaches to an existing latch, and a magnetic sensor that attaches to the inside of an existing door frame. When the door is closed, and the latch is engaged, the magnet comes into proximity with the sensor, sending an electronic signal to your security system. This lets you know the door is closed and the latch is secure.